magnetometric survey
Types of work performed:
- UAV-based magnetometric surveys;
- Aeromagnetic and gradiometric surveys;
- Marine magnetometric surveys;
- Terrestrial magnetometric surveys;
- Search for unexploded ordnance;
- Study of archaeological sites;
- Creation of digital magnetic field datasets, etc.
ВП-ДЭЗ (Дипольное электрическое зондирование)
Описание:
Классический метод зондирования. Питающий диполь (AB) задаёт ток, приёмный (MN) регистрирует отклик. Изменяя кратность разнесения, исследуют глубинное строение.
Преимущества:
- высокая глубинность;
- подходит для 2D/3D инверсии;
- точное определение вертикальных разрезов.
Результаты:
- кривые кажущегося сопротивления и заряжаемости;
- инверсии в виде геоэлектрических разрезов.
ВП-СГ (Срединный градиент)
Описание:
Питающие электроды A и B устанавливаются стационарно, измерения выполняются переносным приёмным диполем в средней зоне линии AB.
Преимущества:
- высокая скорость съёмки;
- равномерное покрытие площади;
- оптимально для картирования и ранних стадий поисков.
Результаты:
- карты кажущегося сопротивления и заряжаемости;
- быстрое выделение аномальных зон.
Векторное ВП (RIP, Vector IP)
Описание:
Метод регистрирует вектор вторичного электрического поля (амплитуда и направление), что позволяет локализовать источники и уточнить геометрию аномалий.
Преимущества:
- эффективен в сложной 3D-геологии;
- помогает выделить вытянутые и перекрытые объекты;
- повышает точность выбора точек бурения.
Результаты:
- карты амплитуды и азимута вектора ВП;
- комплексная интерпретация совместно с ДЭЗ и СГ.
Tasks of Magnetic Prospecting
- Aeromagnetic surveys (aircraft, helicopters) - high-performance surveys of large land and water areas, recording magnetic fields at low altitudes for mapping regional structures.
- Aeromagnetic surveys using UAVs - a modern method that combines the speed of aerial surveys with the detail of ground measurements. This allows for the rapid and accurate survey of hard-to-reach areas.
- Marine magnetic surveys - surveys using towed sensors on vessels and remotely operated vehicles to study the seabed and ocean floor.
- Ground (foot) magnetic surveys - detailed studies of localized objects and small areas using portable magnetometers.
- Search for unexploded ordnance - localization and interpretation of objects on land, at sea, and in coastal zones based on magnetic and electromagnetic field measurements.
Advantages of Magnetic Prospecting:
- Modern equipment – we use the latest magnetometers and software packages for high-quality and highly accurate data processing.
- All work formats – we conduct research on land, in the air (aeromagnetics, UAVs), and at sea.
- Experience and expertise – a team of specialists with many years of experience and deep knowledge in geophysics.
- A full range of services – from fieldwork to comprehensive interpretation and ready-made solutions.
- Continuous development – regular staff training and the introduction of advanced technologies.
Magnetic survey with UAVs
Kargoba site, Abay region.
A low-altitude aeromagnetic survey was conducted at the Kargoba ore occurrence using a 1:5000 scale UAV. The survey was carried out using a DJI Matrice 300 RTK quadcopter equipped with a Geoshark MG30GM quantum magnetometer (rubidium sensor). Survey flights were conducted by following the terrain at an average altitude of 41 meters, at a speed of 18 km/h, and with a recording resolution of 1000 Hz, ensuring highly accurate geomagnetic field recording.
Based on the obtained data, digital models and maps of the anomalous magnetic field were created and interpreted, allowing for a more precise geological and structural analysis of the massif and the identification of promising areas for further exploration.
Western and Southern sites
(Staropyatigorsk ore occurrence), Abay region.
In July 2024, a detailed magnetic survey was conducted at a scale of 1:10,000 using a DJI Matrice 300 RTK quadcopter with a Geoshark MG30GM quantum magnetometer at the Zapadny and Yuzhny sections of the Staropyatigorsk ore occurrence.
Field observations were conducted in two stages due to the complex terrain. The first stage involved aerial photography (at an altitude of 250–330 m), which yielded a digital relief map. The second stage involved magnetic surveying, conducted at low altitudes (33–50 m), allowing for high detail.
The total survey area was 11.5 km², with a total profile length of 149 linear km. Based on the obtained data, numerical arrays, anomalous magnetic field maps, and a three-dimensional geomagnetic model were created. As a result, tectonic elements, faults and anomalous zones were identified that were promising for identifying mineral deposits (Cu, Pb, Au).
High-precision ground (foot) magnetic survey
Magnetic survey of the Kargoba site, Abay Region.
Exploratory geophysical surveys at the Ordabasy site. In 2024, a comprehensive geophysical exploration and appraisal survey was conducted at the Ordabasy site in the Karaganda region to identify potential copper mineralization. A high-precision ground magnetic survey at a scale of 1:10,000 (15 km²), an areal electrical survey using the IP-SG method (160 linear meters), and a profile electrical survey using the MSP method (300 probes) were completed. The data obtained allowed for a refinement of the structural and tectonic structure, localization of zones of hydrothermal reworking of rocks, and the identification of anomalies potentially harboring copper-sulfide mineralization. Based on the comprehensive interpretation, digital models were created and recommendations for further exploration were provided.
High-precision ground magnetic survey at the Shnekovy and Turan sites. In 2024, high-precision ground magnetic surveys were conducted at the Shnekovy (11.18 km²) and Turan (12.76 km²) sites, covering a total area of 23.94 km² and a profile length of 1,200 km. The surveys were carried out on a regular grid with a 20-meter interval between profiles, using modern quantum and Overhauser magnetometers. High measurement accuracy was ensured. The results were used to construct digital magnetic field models with a resolution of 10×10 m, anomaly maps, and their transforms, enabling the efficient use of the data for further geological exploration.
Integrated airborne geophysical survey
A comprehensive airborne geophysical survey was completed at the Aygyrzhal and Central Aktogay areas in the Northern Balkhash region. Profile lengths were 2,610 and 2,460 linear kilometers, respectively, along a 100 x 1,000 m grid at an altitude of 100 m. The purpose of the survey was to establish a standard geophysical base for the license areas and clarify the geological structure of the areas, including identifying and tracing ore-controlling structures and wallrock hydrothermal-metasomatic alterations, as well as unexposed intrusive bodies of varying compositions. Aeromagnetic surveys were conducted using the GT-MAG-2 airborne geophysical system. A CS-3 quantum magnetometer was used to measure the magnetic field, and an RSX-5 digital 1024-channel spectrometer was used to obtain radiometric data. Data processing was carried out, maps and numerical models of the anomalous magnetic field and radionuclide content were compiled.
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